Appliance for the protection and preservation of drains and small sewers



D. F. HOLMAN.

APPLIANCE FOR THE PROTECTION AND PRESERVATION 0F DRAII IS AND SMALLSEWERS,

APPLICATION FILED MAY 28: I919.

Rammed Jan. 6, 1920.

Inventor: xflw $24 M Unrrnn s'rn'rns PATENT OFFICE.

DANIEL F. HOLMAN, OF FARMERSVILLE, OHIO.

APPLIANCE FOR THE PROTECTION AND PRESERVATION OF DRAINS AND SMALLSEWERS.

Specification of Letters Patent.

Patented Jan. 6, 1920.

Application filed May 28, 1919. Serial No. 300,469.

To all whom it may concern:

Be it known that I, DANIEL F. I-IOLMAN, a citizen of the United States,residing at Farmersville, in the county of Montgomery and State of Ohio,have invented a new and useful Appliance for the Protection andPreservation of Drains and Small Sewers.

The object of my invention is to prevent the entrance into drains, orthe passage through them of animals such as muskrats, skunks, rats,rabbits and dogs.

I attain this object by the mechanism illus trated in the accompanyingdrawing in which Figure 1, is a longitudinal section or view of a jointor section of drain tile, one half of which, 2, is molded to match andmeet the ordinary drain or sewer tile; the other half is molded in asquare or box shape, 3, to receive a protective valve or gate 4:, ashereinafter referred to. The square portion of Fig. 1, is one inchlarger, inside, than the outside diameter of the circular portion, whichenables the protective gate or valve, 4, Figs. 1 and 3, to be hinged orhung at the back end thereof and above the outlet of the drain, proper,5, 5, 5, Figs. 1 and 3. Fig. 2 is a cross section of Fig. 1, showing therelation of the square or boxsection 3, to the outlet of the drain-tile,proper, 2, Fig. 1. Fig. 3 is a cross section ofthe square portion ofFig. 1 as it appears viewed from in front of the outlet, showing thegate or valve 4, and the manner in which it is hinged or hung at the topand back end of said section, by means of a rod passing through thewalls of the tile and lugs on the surface of the gate or valve, 8, 8,Figs. 1 and 3.

The gate or valve may be either cast 01' formed of sheet metal and isslightly less in width than the inside of the square section of the tileand in length somewhat longer, so that when the lower end rests on thefloor of the tile, it will stand at any desired angle as shown inFig. 1. The lower end of the gate is indented, 6, Fig. 3, so that theordinary flow of water may pass out without raising or floating thegate. On the under side of the gate at some distance from the bottom, ismolded or attached a transverse line of sharp points or spikes, 7, Fig.1, which, when the gate is slightly raised, forms a second barrier tothe entrance of animals into or passage of rats into cellars orbuildings.

This device may be placed at the outlet of tile drains, at junctions orelsewhere in the drainage system as may be necessary or desirable.

I claim,

An automatic drain tile protector having an indented metal gate hung atan angle of forty-five degrees or any suitable angle in a square outletsection, and having near the lower under side, a transverse line ofpoints or spikes, resting on the floor of the tile when the gate is notafloat, substantially as described.

DANIEL F. HOLMAN.

